{
How to popup the windows system menu?
Maybe you can use Keybd_event to eumlate ALT+SPACE
Maybe you can use a TPopupmenu.
But they always have some problem.
The method below is a perfect solution!
BTW: if your form has borderstyle = bsNone, Please do it like this:
Set forms style = bsSingle; and use the code below to set form boder:
SetWindowLong(Handle, GWL_STYLE,GetWindowLong(Handle, GWL_STYLE)
and (not WS_CAPTION) or WS_DLGFRAME or WS_OVERLAPPED);
}